4 * Copyright (C) 1998 Alexandre Julliard
5 * Copyright (C) 2003 Mike McCormack
6 * Copyright (C) 2005 Robert Shearman
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
32 #define WIN32_NO_STATUS
42 #include "wine/unicode.h"
44 #define MAX_SUBAUTH_COUNT 1
46 const LUID SeIncreaseQuotaPrivilege
= { 5, 0 };
47 const LUID SeSecurityPrivilege
= { 8, 0 };
48 const LUID SeTakeOwnershipPrivilege
= { 9, 0 };
49 const LUID SeLoadDriverPrivilege
= { 10, 0 };
50 const LUID SeSystemProfilePrivilege
= { 11, 0 };
51 const LUID SeSystemtimePrivilege
= { 12, 0 };
52 const LUID SeProfileSingleProcessPrivilege
= { 13, 0 };
53 const LUID SeIncreaseBasePriorityPrivilege
= { 14, 0 };
54 const LUID SeCreatePagefilePrivilege
= { 15, 0 };
55 const LUID SeBackupPrivilege
= { 17, 0 };
56 const LUID SeRestorePrivilege
= { 18, 0 };
57 const LUID SeShutdownPrivilege
= { 19, 0 };
58 const LUID SeDebugPrivilege
= { 20, 0 };
59 const LUID SeSystemEnvironmentPrivilege
= { 22, 0 };
60 const LUID SeChangeNotifyPrivilege
= { 23, 0 };
61 const LUID SeRemoteShutdownPrivilege
= { 24, 0 };
62 const LUID SeUndockPrivilege
= { 25, 0 };
63 const LUID SeManageVolumePrivilege
= { 28, 0 };
64 const LUID SeImpersonatePrivilege
= { 29, 0 };
65 const LUID SeCreateGlobalPrivilege
= { 30, 0 };
67 static const SID world_sid
= { SID_REVISION
, 1, { SECURITY_WORLD_SID_AUTHORITY
}, { SECURITY_WORLD_RID
} };
68 static const SID local_sid
= { SID_REVISION
, 1, { SECURITY_LOCAL_SID_AUTHORITY
}, { SECURITY_LOCAL_RID
} };
69 static const SID interactive_sid
= { SID_REVISION
, 1, { SECURITY_NT_AUTHORITY
}, { SECURITY_INTERACTIVE_RID
} };
70 static const SID anonymous_logon_sid
= { SID_REVISION
, 1, { SECURITY_NT_AUTHORITY
}, { SECURITY_ANONYMOUS_LOGON_RID
} };
71 static const SID authenticated_user_sid
= { SID_REVISION
, 1, { SECURITY_NT_AUTHORITY
}, { SECURITY_AUTHENTICATED_USER_RID
} };
72 static const SID local_system_sid
= { SID_REVISION
, 1, { SECURITY_NT_AUTHORITY
}, { SECURITY_LOCAL_SYSTEM_RID
} };
73 const PSID security_world_sid
= (PSID
)&world_sid
;
74 static const PSID security_local_sid
= (PSID
)&local_sid
;
75 const PSID security_interactive_sid
= (PSID
)&interactive_sid
;
76 static const PSID security_authenticated_user_sid
= (PSID
)&authenticated_user_sid
;
77 const PSID security_local_system_sid
= (PSID
)&local_system_sid
;
79 static luid_t prev_luid_value
= { 1000, 0 };
83 struct object obj
; /* object header */
84 luid_t token_id
; /* system-unique id of token */
85 luid_t modified_id
; /* new id allocated every time token is modified */
86 struct list privileges
; /* privileges available to the token */
87 struct list groups
; /* groups that the user of this token belongs to (sid_and_attributes) */
88 SID
*user
; /* SID of user this token represents */
89 SID
*primary_group
; /* SID of user's primary group */
90 unsigned primary
; /* is this a primary or impersonation token? */
91 ACL
*default_dacl
; /* the default DACL to assign to objects created by this user */
92 TOKEN_SOURCE source
; /* source of the token */
93 SECURITY_IMPERSONATION_LEVEL impersonation_level
; /* impersonation level this token is capable of if non-primary token */
100 unsigned enabled
: 1; /* is the privilege currently enabled? */
101 unsigned def
: 1; /* is the privilege enabled by default? */
107 unsigned enabled
: 1; /* is the sid currently enabled? */
108 unsigned def
: 1; /* is the sid enabled by default? */
109 unsigned logon
: 1; /* is this a logon sid? */
110 unsigned mandatory
: 1; /* is this sid always enabled? */
111 unsigned owner
: 1; /* can this sid be an owner of an object? */
112 unsigned resource
: 1; /* is this a domain-local group? */
113 unsigned deny_only
: 1; /* is this a sid that should be use for denying only? */
117 static void token_dump( struct object
*obj
, int verbose
);
118 static unsigned int token_map_access( struct object
*obj
, unsigned int access
);
119 static void token_destroy( struct object
*obj
);
121 static const struct object_ops token_ops
=
123 sizeof(struct token
), /* size */
124 token_dump
, /* dump */
125 no_add_queue
, /* add_queue */
126 NULL
, /* remove_queue */
128 NULL
, /* satisfied */
129 no_signal
, /* signal */
130 no_get_fd
, /* get_fd */
131 token_map_access
, /* map_access */
132 default_get_sd
, /* get_sd */
133 default_set_sd
, /* set_sd */
134 no_lookup_name
, /* lookup_name */
135 no_open_file
, /* open_file */
136 no_close_handle
, /* close_handle */
137 token_destroy
/* destroy */
141 static void token_dump( struct object
*obj
, int verbose
)
143 fprintf( stderr
, "Security token\n" );
144 /* FIXME: dump token members */
147 static unsigned int token_map_access( struct object
*obj
, unsigned int access
)
149 if (access
& GENERIC_READ
) access
|= TOKEN_READ
;
150 if (access
& GENERIC_WRITE
) access
|= TOKEN_WRITE
;
151 if (access
& GENERIC_EXECUTE
) access
|= STANDARD_RIGHTS_EXECUTE
;
152 if (access
& GENERIC_ALL
) access
|= TOKEN_ALL_ACCESS
;
153 return access
& ~(GENERIC_READ
| GENERIC_WRITE
| GENERIC_EXECUTE
| GENERIC_ALL
);
156 static SID
*security_sid_alloc( const SID_IDENTIFIER_AUTHORITY
*idauthority
, int subauthcount
, const unsigned int subauth
[] )
159 SID
*sid
= mem_alloc( FIELD_OFFSET(SID
, SubAuthority
[subauthcount
]) );
160 if (!sid
) return NULL
;
161 sid
->Revision
= SID_REVISION
;
162 sid
->SubAuthorityCount
= subauthcount
;
163 sid
->IdentifierAuthority
= *idauthority
;
164 for (i
= 0; i
< subauthcount
; i
++)
165 sid
->SubAuthority
[i
] = subauth
[i
];
169 void security_set_thread_token( struct thread
*thread
, obj_handle_t handle
)
174 release_object( thread
->token
);
175 thread
->token
= NULL
;
179 struct token
*token
= (struct token
*)get_handle_obj( current
->process
,
186 release_object( thread
->token
);
187 thread
->token
= token
;
192 const SID
*security_unix_uid_to_sid( uid_t uid
)
194 /* very simple mapping: either the current user or not the current user */
196 return &interactive_sid
;
198 return &anonymous_logon_sid
;
201 static int acl_is_valid( const ACL
*acl
, data_size_t size
)
204 const ACE_HEADER
*ace
;
206 if (size
< sizeof(ACL
))
209 size
= min(size
, MAX_ACL_LEN
);
213 ace
= (const ACE_HEADER
*)(acl
+ 1);
214 for (i
= 0; i
< acl
->AceCount
; i
++)
217 data_size_t sid_size
;
219 if (size
< sizeof(ACE_HEADER
))
221 if (size
< ace
->AceSize
)
223 size
-= ace
->AceSize
;
224 switch (ace
->AceType
)
226 case ACCESS_DENIED_ACE_TYPE
:
227 sid
= (const SID
*)&((const ACCESS_DENIED_ACE
*)ace
)->SidStart
;
228 sid_size
= ace
->AceSize
- FIELD_OFFSET(ACCESS_DENIED_ACE
, SidStart
);
230 case ACCESS_ALLOWED_ACE_TYPE
:
231 sid
= (const SID
*)&((const ACCESS_ALLOWED_ACE
*)ace
)->SidStart
;
232 sid_size
= ace
->AceSize
- FIELD_OFFSET(ACCESS_ALLOWED_ACE
, SidStart
);
234 case SYSTEM_AUDIT_ACE_TYPE
:
235 sid
= (const SID
*)&((const SYSTEM_AUDIT_ACE
*)ace
)->SidStart
;
236 sid_size
= ace
->AceSize
- FIELD_OFFSET(SYSTEM_AUDIT_ACE
, SidStart
);
238 case SYSTEM_ALARM_ACE_TYPE
:
239 sid
= (const SID
*)&((const SYSTEM_ALARM_ACE
*)ace
)->SidStart
;
240 sid_size
= ace
->AceSize
- FIELD_OFFSET(SYSTEM_ALARM_ACE
, SidStart
);
245 if (sid_size
< FIELD_OFFSET(SID
, SubAuthority
[0]) ||
246 sid_size
< FIELD_OFFSET(SID
, SubAuthority
[sid
->SubAuthorityCount
]))
248 ace
= ace_next( ace
);
253 /* checks whether all members of a security descriptor fit inside the size
254 * of memory specified */
255 int sd_is_valid( const struct security_descriptor
*sd
, data_size_t size
)
257 size_t offset
= sizeof(struct security_descriptor
);
267 if ((sd
->owner_len
>= FIELD_OFFSET(SID
, SubAuthority
[255])) ||
268 (offset
+ sd
->owner_len
> size
))
270 owner
= sd_get_owner( sd
);
273 size_t needed_size
= FIELD_OFFSET(SID
, SubAuthority
[owner
->SubAuthorityCount
]);
274 if ((sd
->owner_len
< sizeof(SID
)) || (needed_size
> sd
->owner_len
))
277 offset
+= sd
->owner_len
;
279 if ((sd
->group_len
>= FIELD_OFFSET(SID
, SubAuthority
[255])) ||
280 (offset
+ sd
->group_len
> size
))
282 group
= sd_get_group( sd
);
285 size_t needed_size
= FIELD_OFFSET(SID
, SubAuthority
[group
->SubAuthorityCount
]);
286 if ((sd
->group_len
< sizeof(SID
)) || (needed_size
> sd
->group_len
))
289 offset
+= sd
->group_len
;
291 if ((sd
->sacl_len
>= MAX_ACL_LEN
) || (offset
+ sd
->sacl_len
> size
))
293 sacl
= sd_get_sacl( sd
, &dummy
);
294 if (sacl
&& !acl_is_valid( sacl
, sd
->sacl_len
))
296 offset
+= sd
->sacl_len
;
298 if ((sd
->dacl_len
>= MAX_ACL_LEN
) || (offset
+ sd
->dacl_len
> size
))
300 dacl
= sd_get_dacl( sd
, &dummy
);
301 if (dacl
&& !acl_is_valid( dacl
, sd
->dacl_len
))
303 offset
+= sd
->dacl_len
;
308 /* determines whether an object_attributes struct is valid in a buffer
309 * and calls set_error appropriately */
310 int objattr_is_valid( const struct object_attributes
*objattr
, data_size_t size
)
312 if ((size
< sizeof(*objattr
)) || (size
- sizeof(*objattr
) < objattr
->sd_len
))
314 set_error( STATUS_ACCESS_VIOLATION
);
320 const struct security_descriptor
*sd
= (const struct security_descriptor
*)(objattr
+ 1);
321 if (!sd_is_valid( sd
, objattr
->sd_len
))
323 set_error( STATUS_INVALID_SECURITY_DESCR
);
331 /* maps from generic rights to specific rights as given by a mapping */
332 static inline void map_generic_mask(unsigned int *mask
, const GENERIC_MAPPING
*mapping
)
334 if (*mask
& GENERIC_READ
) *mask
|= mapping
->GenericRead
;
335 if (*mask
& GENERIC_WRITE
) *mask
|= mapping
->GenericWrite
;
336 if (*mask
& GENERIC_EXECUTE
) *mask
|= mapping
->GenericExecute
;
337 if (*mask
& GENERIC_ALL
) *mask
|= mapping
->GenericAll
;
341 static inline int is_equal_luid( const LUID
*luid1
, const LUID
*luid2
)
343 return (luid1
->LowPart
== luid2
->LowPart
&& luid1
->HighPart
== luid2
->HighPart
);
346 static inline void allocate_luid( luid_t
*luid
)
348 prev_luid_value
.low_part
++;
349 *luid
= prev_luid_value
;
352 DECL_HANDLER( allocate_locally_unique_id
)
354 allocate_luid( &reply
->luid
);
357 static inline void luid_and_attr_from_privilege( LUID_AND_ATTRIBUTES
*out
, const struct privilege
*in
)
359 out
->Luid
= in
->luid
;
361 (in
->enabled
? SE_PRIVILEGE_ENABLED
: 0) |
362 (in
->def
? SE_PRIVILEGE_ENABLED_BY_DEFAULT
: 0);
365 static struct privilege
*privilege_add( struct token
*token
, const LUID
*luid
, int enabled
)
367 struct privilege
*privilege
= mem_alloc( sizeof(*privilege
) );
370 privilege
->luid
= *luid
;
371 privilege
->def
= privilege
->enabled
= (enabled
!= 0);
372 list_add_tail( &token
->privileges
, &privilege
->entry
);
377 static inline void privilege_remove( struct privilege
*privilege
)
379 list_remove( &privilege
->entry
);
383 static void token_destroy( struct object
*obj
)
386 struct list
*cursor
, *cursor_next
;
388 assert( obj
->ops
== &token_ops
);
389 token
= (struct token
*)obj
;
393 LIST_FOR_EACH_SAFE( cursor
, cursor_next
, &token
->privileges
)
395 struct privilege
*privilege
= LIST_ENTRY( cursor
, struct privilege
, entry
);
396 privilege_remove( privilege
);
399 LIST_FOR_EACH_SAFE( cursor
, cursor_next
, &token
->groups
)
401 struct group
*group
= LIST_ENTRY( cursor
, struct group
, entry
);
402 list_remove( &group
->entry
);
406 free( token
->default_dacl
);
409 /* creates a new token.
410 * groups may be NULL if group_count is 0.
411 * privs may be NULL if priv_count is 0.
412 * default_dacl may be NULL, indicating that all objects created by the user
414 * modified_id may be NULL, indicating that a new modified_id luid should be
417 static struct token
*create_token( unsigned primary
, const SID
*user
,
418 const SID_AND_ATTRIBUTES
*groups
, unsigned int group_count
,
419 const LUID_AND_ATTRIBUTES
*privs
, unsigned int priv_count
,
420 const ACL
*default_dacl
, TOKEN_SOURCE source
,
421 const luid_t
*modified_id
,
422 SECURITY_IMPERSONATION_LEVEL impersonation_level
)
424 struct token
*token
= alloc_object( &token_ops
);
429 allocate_luid( &token
->token_id
);
431 token
->modified_id
= *modified_id
;
433 allocate_luid( &token
->modified_id
);
434 list_init( &token
->privileges
);
435 list_init( &token
->groups
);
436 token
->primary
= primary
;
437 /* primary tokens don't have impersonation levels */
439 token
->impersonation_level
= -1;
441 token
->impersonation_level
= impersonation_level
;
442 token
->default_dacl
= NULL
;
443 token
->primary_group
= NULL
;
446 token
->user
= memdup( user
, FIELD_OFFSET(SID
, SubAuthority
[user
->SubAuthorityCount
]) );
449 release_object( token
);
454 for (i
= 0; i
< group_count
; i
++)
456 size_t size
= FIELD_OFFSET( struct group
, sid
.SubAuthority
[((const SID
*)groups
[i
].Sid
)->SubAuthorityCount
] );
457 struct group
*group
= mem_alloc( size
);
461 release_object( token
);
464 memcpy( &group
->sid
, groups
[i
].Sid
, FIELD_OFFSET( SID
, SubAuthority
[((const SID
*)groups
[i
].Sid
)->SubAuthorityCount
] ) );
465 group
->enabled
= TRUE
;
467 group
->logon
= FALSE
;
468 group
->mandatory
= (groups
[i
].Attributes
& SE_GROUP_MANDATORY
) ? TRUE
: FALSE
;
469 group
->owner
= groups
[i
].Attributes
& SE_GROUP_OWNER
? TRUE
: FALSE
;
470 group
->resource
= FALSE
;
471 group
->deny_only
= FALSE
;
472 list_add_tail( &token
->groups
, &group
->entry
);
473 /* Use first owner capable group as an owner */
474 if (!token
->primary_group
&& group
->owner
)
475 token
->primary_group
= &group
->sid
;
478 /* copy privileges */
479 for (i
= 0; i
< priv_count
; i
++)
481 /* note: we don't check uniqueness: the caller must make sure
482 * privs doesn't contain any duplicate luids */
483 if (!privilege_add( token
, &privs
[i
].Luid
,
484 privs
[i
].Attributes
& SE_PRIVILEGE_ENABLED
))
486 release_object( token
);
493 token
->default_dacl
= memdup( default_dacl
, default_dacl
->AclSize
);
494 if (!token
->default_dacl
)
496 release_object( token
);
501 token
->source
= source
;
506 struct token
*token_duplicate( struct token
*src_token
, unsigned primary
,
507 SECURITY_IMPERSONATION_LEVEL impersonation_level
)
509 const luid_t
*modified_id
=
510 primary
|| (impersonation_level
== src_token
->impersonation_level
) ?
511 &src_token
->modified_id
: NULL
;
512 struct token
*token
= NULL
;
513 struct privilege
*privilege
;
516 if ((impersonation_level
< SecurityAnonymous
) ||
517 (impersonation_level
> SecurityDelegation
))
519 set_error( STATUS_BAD_IMPERSONATION_LEVEL
);
523 if (primary
|| (impersonation_level
<= src_token
->impersonation_level
))
524 token
= create_token( primary
, src_token
->user
, NULL
, 0,
525 NULL
, 0, src_token
->default_dacl
,
526 src_token
->source
, modified_id
,
527 impersonation_level
);
528 else set_error( STATUS_BAD_IMPERSONATION_LEVEL
);
530 if (!token
) return token
;
533 LIST_FOR_EACH_ENTRY( group
, &src_token
->groups
, struct group
, entry
)
535 size_t size
= FIELD_OFFSET( struct group
, sid
.SubAuthority
[group
->sid
.SubAuthorityCount
] );
536 struct group
*newgroup
= mem_alloc( size
);
539 release_object( token
);
542 memcpy( newgroup
, group
, size
);
543 list_add_tail( &token
->groups
, &newgroup
->entry
);
545 token
->primary_group
= src_token
->primary_group
;
546 assert( token
->primary_group
);
548 /* copy privileges */
549 LIST_FOR_EACH_ENTRY( privilege
, &src_token
->privileges
, struct privilege
, entry
)
550 if (!privilege_add( token
, &privilege
->luid
, privilege
->enabled
))
552 release_object( token
);
559 static ACL
*create_default_dacl( const SID
*user
)
561 ACCESS_ALLOWED_ACE
*aaa
;
564 size_t default_dacl_size
= sizeof(ACL
) +
565 2*(sizeof(ACCESS_ALLOWED_ACE
) - sizeof(DWORD
)) +
566 sizeof(local_system_sid
) +
567 FIELD_OFFSET(SID
, SubAuthority
[user
->SubAuthorityCount
]);
569 default_dacl
= mem_alloc( default_dacl_size
);
570 if (!default_dacl
) return NULL
;
572 default_dacl
->AclRevision
= ACL_REVISION
;
573 default_dacl
->Sbz1
= 0;
574 default_dacl
->AclSize
= default_dacl_size
;
575 default_dacl
->AceCount
= 2;
576 default_dacl
->Sbz2
= 0;
578 /* GENERIC_ALL for Local System */
579 aaa
= (ACCESS_ALLOWED_ACE
*)(default_dacl
+ 1);
580 aaa
->Header
.AceType
= ACCESS_ALLOWED_ACE_TYPE
;
581 aaa
->Header
.AceFlags
= 0;
582 aaa
->Header
.AceSize
= (sizeof(ACCESS_ALLOWED_ACE
) - sizeof(DWORD
)) +
583 sizeof(local_system_sid
);
584 aaa
->Mask
= GENERIC_ALL
;
585 sid
= (SID
*)&aaa
->SidStart
;
586 memcpy( sid
, &local_system_sid
, sizeof(local_system_sid
) );
588 /* GENERIC_ALL for specified user */
589 aaa
= (ACCESS_ALLOWED_ACE
*)((char *)aaa
+ aaa
->Header
.AceSize
);
590 aaa
->Header
.AceType
= ACCESS_ALLOWED_ACE_TYPE
;
591 aaa
->Header
.AceFlags
= 0;
592 aaa
->Header
.AceSize
= (sizeof(ACCESS_ALLOWED_ACE
) - sizeof(DWORD
)) +
593 FIELD_OFFSET( SID
, SubAuthority
[user
->SubAuthorityCount
] );
594 aaa
->Mask
= GENERIC_ALL
;
595 sid
= (SID
*)&aaa
->SidStart
;
596 memcpy( sid
, user
, FIELD_OFFSET(SID
, SubAuthority
[user
->SubAuthorityCount
]) );
603 SID_IDENTIFIER_AUTHORITY idauth
;
605 unsigned int subauth
[MAX_SUBAUTH_COUNT
];
608 struct token
*token_create_admin( void )
610 struct token
*token
= NULL
;
611 static const SID_IDENTIFIER_AUTHORITY nt_authority
= { SECURITY_NT_AUTHORITY
};
612 static const unsigned int alias_admins_subauth
[] = { SECURITY_BUILTIN_DOMAIN_RID
, DOMAIN_ALIAS_RID_ADMINS
};
613 static const unsigned int alias_users_subauth
[] = { SECURITY_BUILTIN_DOMAIN_RID
, DOMAIN_ALIAS_RID_USERS
};
614 /* on Windows, this value changes every time the user logs on */
615 static const unsigned int logon_subauth
[] = { SECURITY_LOGON_IDS_RID
, 0, 1 /* FIXME: should be randomly generated when tokens are inherited by new processes */ };
616 PSID alias_admins_sid
;
617 PSID alias_users_sid
;
619 /* note: should be the owner specified in the token */
620 ACL
*default_dacl
= create_default_dacl( &interactive_sid
);
622 alias_admins_sid
= security_sid_alloc( &nt_authority
, sizeof(alias_admins_subauth
)/sizeof(alias_admins_subauth
[0]),
623 alias_admins_subauth
);
624 alias_users_sid
= security_sid_alloc( &nt_authority
, sizeof(alias_users_subauth
)/sizeof(alias_users_subauth
[0]),
625 alias_users_subauth
);
626 logon_sid
= security_sid_alloc( &nt_authority
, sizeof(logon_subauth
)/sizeof(logon_subauth
[0]),
629 if (alias_admins_sid
&& alias_users_sid
&& logon_sid
&& default_dacl
)
631 const LUID_AND_ATTRIBUTES admin_privs
[] =
633 { SeChangeNotifyPrivilege
, SE_PRIVILEGE_ENABLED
},
634 { SeSecurityPrivilege
, 0 },
635 { SeBackupPrivilege
, 0 },
636 { SeRestorePrivilege
, 0 },
637 { SeSystemtimePrivilege
, 0 },
638 { SeShutdownPrivilege
, 0 },
639 { SeRemoteShutdownPrivilege
, 0 },
640 { SeTakeOwnershipPrivilege
, 0 },
641 { SeDebugPrivilege
, 0 },
642 { SeSystemEnvironmentPrivilege
, 0 },
643 { SeSystemProfilePrivilege
, 0 },
644 { SeProfileSingleProcessPrivilege
, 0 },
645 { SeIncreaseBasePriorityPrivilege
, 0 },
646 { SeLoadDriverPrivilege
, SE_PRIVILEGE_ENABLED
},
647 { SeCreatePagefilePrivilege
, 0 },
648 { SeIncreaseQuotaPrivilege
, 0 },
649 { SeUndockPrivilege
, 0 },
650 { SeManageVolumePrivilege
, 0 },
651 { SeImpersonatePrivilege
, SE_PRIVILEGE_ENABLED
},
652 { SeCreateGlobalPrivilege
, SE_PRIVILEGE_ENABLED
},
654 /* note: we don't include non-builtin groups here for the user -
655 * telling us these is the job of a client-side program */
656 const SID_AND_ATTRIBUTES admin_groups
[] =
658 { security_world_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
659 { security_local_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
660 { security_interactive_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
661 { security_authenticated_user_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
662 { alias_admins_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
|SE_GROUP_OWNER
},
663 { alias_users_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
},
664 { logon_sid
, SE_GROUP_ENABLED
|SE_GROUP_ENABLED_BY_DEFAULT
|SE_GROUP_MANDATORY
|SE_GROUP_LOGON_ID
},
666 static const TOKEN_SOURCE admin_source
= {"SeMgr", {0, 0}};
667 token
= create_token( TRUE
, security_unix_uid_to_sid( getuid() ),
668 admin_groups
, sizeof(admin_groups
)/sizeof(admin_groups
[0]),
669 admin_privs
, sizeof(admin_privs
)/sizeof(admin_privs
[0]),
670 default_dacl
, admin_source
, NULL
, -1 );
671 /* we really need a primary group */
672 assert( token
->primary_group
);
676 free( alias_admins_sid
);
677 free( alias_users_sid
);
678 free( default_dacl
);
683 static struct privilege
*token_find_privilege( struct token
*token
, const LUID
*luid
, int enabled_only
)
685 struct privilege
*privilege
;
686 LIST_FOR_EACH_ENTRY( privilege
, &token
->privileges
, struct privilege
, entry
)
688 if (is_equal_luid( luid
, &privilege
->luid
))
690 if (enabled_only
&& !privilege
->enabled
)
698 static unsigned int token_adjust_privileges( struct token
*token
, const LUID_AND_ATTRIBUTES
*privs
,
699 unsigned int count
, LUID_AND_ATTRIBUTES
*mod_privs
,
700 unsigned int mod_privs_count
)
702 unsigned int i
, modified_count
= 0;
704 /* mark as modified */
705 allocate_luid( &token
->modified_id
);
707 for (i
= 0; i
< count
; i
++)
709 struct privilege
*privilege
=
710 token_find_privilege( token
, &privs
[i
].Luid
, FALSE
);
713 set_error( STATUS_NOT_ALL_ASSIGNED
);
717 if (privs
[i
].Attributes
& SE_PRIVILEGE_REMOVE
)
718 privilege_remove( privilege
);
721 /* save previous state for caller */
724 luid_and_attr_from_privilege(mod_privs
, privilege
);
730 if (privs
[i
].Attributes
& SE_PRIVILEGE_ENABLED
)
731 privilege
->enabled
= TRUE
;
733 privilege
->enabled
= FALSE
;
736 return modified_count
;
739 static void token_disable_privileges( struct token
*token
)
741 struct privilege
*privilege
;
743 /* mark as modified */
744 allocate_luid( &token
->modified_id
);
746 LIST_FOR_EACH_ENTRY( privilege
, &token
->privileges
, struct privilege
, entry
)
747 privilege
->enabled
= FALSE
;
750 int token_check_privileges( struct token
*token
, int all_required
,
751 const LUID_AND_ATTRIBUTES
*reqprivs
,
752 unsigned int count
, LUID_AND_ATTRIBUTES
*usedprivs
)
754 unsigned int i
, enabled_count
= 0;
756 for (i
= 0; i
< count
; i
++)
758 struct privilege
*privilege
=
759 token_find_privilege( token
, &reqprivs
[i
].Luid
, TRUE
);
762 usedprivs
[i
] = reqprivs
[i
];
764 if (privilege
&& privilege
->enabled
)
768 usedprivs
[i
].Attributes
|= SE_PRIVILEGE_USED_FOR_ACCESS
;
773 return (enabled_count
== count
);
775 return (enabled_count
> 0);
778 static int token_sid_present( struct token
*token
, const SID
*sid
, int deny
)
782 if (security_equal_sid( token
->user
, sid
)) return TRUE
;
784 LIST_FOR_EACH_ENTRY( group
, &token
->groups
, struct group
, entry
)
786 if (!group
->enabled
) continue;
787 if (group
->deny_only
&& !deny
) continue;
789 if (security_equal_sid( &group
->sid
, sid
)) return TRUE
;
795 /* Checks access to a security descriptor. 'sd' must have been validated by
796 * caller. It returns STATUS_SUCCESS if call succeeded or an error indicating
797 * the reason. 'status' parameter will indicate if access is granted or denied.
799 * If both returned value and 'status' are STATUS_SUCCESS then access is granted.
801 static unsigned int token_access_check( struct token
*token
,
802 const struct security_descriptor
*sd
,
803 unsigned int desired_access
,
804 LUID_AND_ATTRIBUTES
*privs
,
805 unsigned int *priv_count
,
806 const GENERIC_MAPPING
*mapping
,
807 unsigned int *granted_access
,
808 unsigned int *status
)
810 unsigned int current_access
= 0;
811 unsigned int denied_access
= 0;
815 const ACE_HEADER
*ace
;
818 /* assume no access rights */
821 /* fail if desired_access contains generic rights */
822 if (desired_access
& (GENERIC_READ
|GENERIC_WRITE
|GENERIC_EXECUTE
|GENERIC_ALL
))
825 return STATUS_GENERIC_NOT_MAPPED
;
828 dacl
= sd_get_dacl( sd
, &dacl_present
);
829 owner
= sd_get_owner( sd
);
830 if (!owner
|| !sd_get_group( sd
))
833 return STATUS_INVALID_SECURITY_DESCR
;
836 /* 1: Grant desired access if the object is unprotected */
837 if (!dacl_present
|| !dacl
)
840 *granted_access
= desired_access
;
841 return *status
= STATUS_SUCCESS
;
844 /* 2: Check if caller wants access to system security part. Note: access
845 * is only granted if specifically asked for */
846 if (desired_access
& ACCESS_SYSTEM_SECURITY
)
848 const LUID_AND_ATTRIBUTES security_priv
= { SeSecurityPrivilege
, 0 };
849 LUID_AND_ATTRIBUTES retpriv
= security_priv
;
850 if (token_check_privileges( token
, TRUE
, &security_priv
, 1, &retpriv
))
854 /* assumes that there will only be one privilege to return */
855 if (*priv_count
>= 1)
863 return STATUS_BUFFER_TOO_SMALL
;
866 current_access
|= ACCESS_SYSTEM_SECURITY
;
867 if (desired_access
== current_access
)
869 *granted_access
= current_access
;
870 return *status
= STATUS_SUCCESS
;
876 *status
= STATUS_PRIVILEGE_NOT_HELD
;
877 return STATUS_SUCCESS
;
880 else if (priv_count
) *priv_count
= 0;
882 /* 3: Check whether the token is the owner */
883 /* NOTE: SeTakeOwnershipPrivilege is not checked for here - it is instead
884 * checked when a "set owner" call is made, overriding the access rights
885 * determined here. */
886 if (token_sid_present( token
, owner
, FALSE
))
888 current_access
|= (READ_CONTROL
| WRITE_DAC
);
889 if (desired_access
== current_access
)
891 *granted_access
= current_access
;
892 return *status
= STATUS_SUCCESS
;
896 /* 4: Grant rights according to the DACL */
897 ace
= (const ACE_HEADER
*)(dacl
+ 1);
898 for (i
= 0; i
< dacl
->AceCount
; i
++, ace
= ace_next( ace
))
900 const ACCESS_ALLOWED_ACE
*aa_ace
;
901 const ACCESS_DENIED_ACE
*ad_ace
;
904 if (ace
->AceFlags
& INHERIT_ONLY_ACE
)
907 switch (ace
->AceType
)
909 case ACCESS_DENIED_ACE_TYPE
:
910 ad_ace
= (const ACCESS_DENIED_ACE
*)ace
;
911 sid
= (const SID
*)&ad_ace
->SidStart
;
912 if (token_sid_present( token
, sid
, TRUE
))
914 unsigned int access
= ad_ace
->Mask
;
915 map_generic_mask(&access
, mapping
);
916 if (desired_access
& MAXIMUM_ALLOWED
)
917 denied_access
|= access
;
920 denied_access
|= (access
& ~current_access
);
921 if (desired_access
& access
) goto done
;
925 case ACCESS_ALLOWED_ACE_TYPE
:
926 aa_ace
= (const ACCESS_ALLOWED_ACE
*)ace
;
927 sid
= (const SID
*)&aa_ace
->SidStart
;
928 if (token_sid_present( token
, sid
, FALSE
))
930 unsigned int access
= aa_ace
->Mask
;
931 map_generic_mask(&access
, mapping
);
932 if (desired_access
& MAXIMUM_ALLOWED
)
933 current_access
|= access
;
935 current_access
|= (access
& ~denied_access
);
940 /* don't bother carrying on checking if we've already got all of
942 if (desired_access
== *granted_access
)
947 if (desired_access
& MAXIMUM_ALLOWED
)
948 *granted_access
= current_access
& ~denied_access
;
950 if ((current_access
& desired_access
) == desired_access
)
951 *granted_access
= current_access
& desired_access
;
955 *status
= *granted_access
? STATUS_SUCCESS
: STATUS_ACCESS_DENIED
;
956 return STATUS_SUCCESS
;
959 const ACL
*token_get_default_dacl( struct token
*token
)
961 return token
->default_dacl
;
964 const SID
*token_get_user( struct token
*token
)
969 const SID
*token_get_primary_group( struct token
*token
)
971 return token
->primary_group
;
974 int check_object_access(struct object
*obj
, unsigned int *access
)
976 GENERIC_MAPPING mapping
;
977 struct token
*token
= current
->token
? current
->token
: current
->process
->token
;
978 LUID_AND_ATTRIBUTES priv
;
979 unsigned int status
, priv_count
= 1;
982 mapping
.GenericAll
= obj
->ops
->map_access( obj
, GENERIC_ALL
);
986 if (*access
& MAXIMUM_ALLOWED
)
987 *access
= mapping
.GenericAll
;
991 mapping
.GenericRead
= obj
->ops
->map_access( obj
, GENERIC_READ
);
992 mapping
.GenericWrite
= obj
->ops
->map_access( obj
, GENERIC_WRITE
);
993 mapping
.GenericExecute
= obj
->ops
->map_access( obj
, GENERIC_EXECUTE
);
995 res
= token_access_check( token
, obj
->sd
, *access
, &priv
, &priv_count
,
996 &mapping
, access
, &status
) == STATUS_SUCCESS
&&
997 status
== STATUS_SUCCESS
;
999 if (!res
) set_error( STATUS_ACCESS_DENIED
);
1004 /* open a security token */
1005 DECL_HANDLER(open_token
)
1007 if (req
->flags
& OPEN_TOKEN_THREAD
)
1009 struct thread
*thread
= get_thread_from_handle( req
->handle
, 0 );
1014 if (thread
->token
->impersonation_level
<= SecurityAnonymous
)
1015 set_error( STATUS_CANT_OPEN_ANONYMOUS
);
1017 reply
->token
= alloc_handle( current
->process
, thread
->token
,
1018 req
->access
, req
->attributes
);
1021 set_error( STATUS_NO_TOKEN
);
1022 release_object( thread
);
1027 struct process
*process
= get_process_from_handle( req
->handle
, 0 );
1031 reply
->token
= alloc_handle( current
->process
, process
->token
, req
->access
,
1034 set_error( STATUS_NO_TOKEN
);
1035 release_object( process
);
1040 /* adjust the privileges held by a token */
1041 DECL_HANDLER(adjust_token_privileges
)
1043 struct token
*token
;
1044 unsigned int access
= TOKEN_ADJUST_PRIVILEGES
;
1046 if (req
->get_modified_state
) access
|= TOKEN_QUERY
;
1048 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
1049 access
, &token_ops
)))
1051 const LUID_AND_ATTRIBUTES
*privs
= get_req_data();
1052 LUID_AND_ATTRIBUTES
*modified_privs
= NULL
;
1053 unsigned int priv_count
= get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES
);
1054 unsigned int modified_priv_count
= 0;
1056 if (req
->get_modified_state
&& !req
->disable_all
)
1059 /* count modified privs */
1060 for (i
= 0; i
< priv_count
; i
++)
1062 struct privilege
*privilege
=
1063 token_find_privilege( token
, &privs
[i
].Luid
, FALSE
);
1064 if (privilege
&& req
->get_modified_state
)
1065 modified_priv_count
++;
1067 reply
->len
= modified_priv_count
;
1068 modified_priv_count
= min( modified_priv_count
, get_reply_max_size() / sizeof(*modified_privs
) );
1069 if (modified_priv_count
)
1070 modified_privs
= set_reply_data_size( modified_priv_count
* sizeof(*modified_privs
) );
1072 reply
->len
= modified_priv_count
* sizeof(*modified_privs
);
1074 if (req
->disable_all
)
1075 token_disable_privileges( token
);
1077 modified_priv_count
= token_adjust_privileges( token
, privs
,
1078 priv_count
, modified_privs
, modified_priv_count
);
1080 release_object( token
);
1084 /* retrieves the list of privileges that may be held be the token */
1085 DECL_HANDLER(get_token_privileges
)
1087 struct token
*token
;
1089 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
1094 LUID_AND_ATTRIBUTES
*privs
;
1095 struct privilege
*privilege
;
1097 LIST_FOR_EACH_ENTRY( privilege
, &token
->privileges
, struct privilege
, entry
)
1100 reply
->len
= priv_count
* sizeof(*privs
);
1101 if (reply
->len
<= get_reply_max_size())
1103 privs
= set_reply_data_size( priv_count
* sizeof(*privs
) );
1107 LIST_FOR_EACH_ENTRY( privilege
, &token
->privileges
, struct privilege
, entry
)
1109 luid_and_attr_from_privilege( &privs
[i
], privilege
);
1115 set_error(STATUS_BUFFER_TOO_SMALL
);
1117 release_object( token
);
1121 /* creates a duplicate of the token */
1122 DECL_HANDLER(duplicate_token
)
1124 struct token
*src_token
;
1126 if ((src_token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
1130 struct token
*token
= token_duplicate( src_token
, req
->primary
, req
->impersonation_level
);
1133 reply
->new_handle
= alloc_handle( current
->process
, token
, req
->access
, req
->attributes
);
1134 release_object( token
);
1136 release_object( src_token
);
1140 /* checks the specified privileges are held by the token */
1141 DECL_HANDLER(check_token_privileges
)
1143 struct token
*token
;
1145 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
1149 unsigned int count
= get_req_data_size() / sizeof(LUID_AND_ATTRIBUTES
);
1151 if (!token
->primary
&& token
->impersonation_level
<= SecurityAnonymous
)
1152 set_error( STATUS_BAD_IMPERSONATION_LEVEL
);
1153 else if (get_reply_max_size() >= count
* sizeof(LUID_AND_ATTRIBUTES
))
1155 LUID_AND_ATTRIBUTES
*usedprivs
= set_reply_data_size( count
* sizeof(*usedprivs
) );
1156 reply
->has_privileges
= token_check_privileges( token
, req
->all_required
, get_req_data(), count
, usedprivs
);
1159 set_error( STATUS_BUFFER_OVERFLOW
);
1160 release_object( token
);
1164 /* checks that a user represented by a token is allowed to access an object
1165 * represented by a security descriptor */
1166 DECL_HANDLER(access_check
)
1168 data_size_t sd_size
= get_req_data_size();
1169 const struct security_descriptor
*sd
= get_req_data();
1170 struct token
*token
;
1172 if (!sd_is_valid( sd
, sd_size
))
1174 set_error( STATUS_ACCESS_VIOLATION
);
1178 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
1182 GENERIC_MAPPING mapping
;
1183 unsigned int status
;
1184 LUID_AND_ATTRIBUTES priv
;
1185 unsigned int priv_count
= 1;
1187 memset(&priv
, 0, sizeof(priv
));
1189 /* only impersonation tokens may be used with this function */
1192 set_error( STATUS_NO_IMPERSONATION_TOKEN
);
1193 release_object( token
);
1196 /* anonymous impersonation tokens can't be used */
1197 if (token
->impersonation_level
<= SecurityAnonymous
)
1199 set_error( STATUS_BAD_IMPERSONATION_LEVEL
);
1200 release_object( token
);
1204 mapping
.GenericRead
= req
->mapping_read
;
1205 mapping
.GenericWrite
= req
->mapping_write
;
1206 mapping
.GenericExecute
= req
->mapping_execute
;
1207 mapping
.GenericAll
= req
->mapping_all
;
1209 status
= token_access_check(
1210 token
, sd
, req
->desired_access
, &priv
, &priv_count
, &mapping
,
1211 &reply
->access_granted
, &reply
->access_status
);
1213 reply
->privileges_len
= priv_count
*sizeof(LUID_AND_ATTRIBUTES
);
1215 if ((priv_count
> 0) && (reply
->privileges_len
<= get_reply_max_size()))
1217 LUID_AND_ATTRIBUTES
*privs
= set_reply_data_size( priv_count
* sizeof(*privs
) );
1218 memcpy( privs
, &priv
, sizeof(priv
) );
1221 set_error( status
);
1222 release_object( token
);
1226 /* retrieves the SID of the user that the token represents */
1227 DECL_HANDLER(get_token_user
)
1229 struct token
*token
;
1231 reply
->user_len
= 0;
1233 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
1237 const SID
*user
= token
->user
;
1239 reply
->user_len
= FIELD_OFFSET(SID
, SubAuthority
[user
->SubAuthorityCount
]);
1240 if (reply
->user_len
<= get_reply_max_size())
1242 SID
*user_reply
= set_reply_data_size( reply
->user_len
);
1244 memcpy( user_reply
, user
, reply
->user_len
);
1246 else set_error( STATUS_BUFFER_TOO_SMALL
);
1248 release_object( token
);
1252 /* retrieves the groups that the user represented by the token belongs to */
1253 DECL_HANDLER(get_token_groups
)
1255 struct token
*token
;
1257 reply
->user_len
= 0;
1259 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
1263 size_t size_needed
= sizeof(struct token_groups
);
1264 unsigned int group_count
= 0;
1265 const struct group
*group
;
1267 LIST_FOR_EACH_ENTRY( group
, &token
->groups
, const struct group
, entry
)
1270 size_needed
+= FIELD_OFFSET(SID
, SubAuthority
[group
->sid
.SubAuthorityCount
]);
1272 size_needed
+= sizeof(unsigned int) * group_count
;
1274 reply
->user_len
= size_needed
;
1276 if (size_needed
<= get_reply_max_size())
1278 struct token_groups
*tg
= set_reply_data_size( size_needed
);
1281 unsigned int *attr_ptr
= (unsigned int *)(tg
+ 1);
1282 SID
*sid_ptr
= (SID
*)(attr_ptr
+ group_count
);
1284 tg
->count
= group_count
;
1286 LIST_FOR_EACH_ENTRY( group
, &token
->groups
, const struct group
, entry
)
1290 if (group
->mandatory
) *attr_ptr
|= SE_GROUP_MANDATORY
;
1291 if (group
->def
) *attr_ptr
|= SE_GROUP_ENABLED_BY_DEFAULT
;
1292 if (group
->enabled
) *attr_ptr
|= SE_GROUP_ENABLED
;
1293 if (group
->owner
) *attr_ptr
|= SE_GROUP_OWNER
;
1294 if (group
->deny_only
) *attr_ptr
|= SE_GROUP_USE_FOR_DENY_ONLY
;
1295 if (group
->resource
) *attr_ptr
|= SE_GROUP_RESOURCE
;
1297 memcpy(sid_ptr
, &group
->sid
, FIELD_OFFSET(SID
, SubAuthority
[group
->sid
.SubAuthorityCount
]));
1299 sid_ptr
= (SID
*)((char *)sid_ptr
+ FIELD_OFFSET(SID
, SubAuthority
[group
->sid
.SubAuthorityCount
]));
1304 else set_error( STATUS_BUFFER_TOO_SMALL
);
1306 release_object( token
);
1310 DECL_HANDLER(get_token_impersonation_level
)
1312 struct token
*token
;
1314 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
1319 set_error( STATUS_INVALID_PARAMETER
);
1321 reply
->impersonation_level
= token
->impersonation_level
;
1323 release_object( token
);
1327 DECL_HANDLER(get_token_statistics
)
1329 struct token
*token
;
1331 if ((token
= (struct token
*)get_handle_obj( current
->process
, req
->handle
,
1335 reply
->token_id
= token
->token_id
;
1336 reply
->modified_id
= token
->modified_id
;
1337 reply
->primary
= token
->primary
;
1338 reply
->impersonation_level
= token
->impersonation_level
;
1339 reply
->group_count
= list_count( &token
->groups
);
1340 reply
->privilege_count
= list_count( &token
->privileges
);
1342 release_object( token
);